git push fails from AI agent: no SSH key configured and PAT unusable for HTTPS git push

[dnyw4l3n13]

Summary

While working on issue credfeto/credfeto-ssh-key-mgr#15, the AI agent cannot push to the remote repository via git push.

Error sequence

1. Initial error: Host key verification failed. (no ~/.ssh/known_hosts in agent environment)
2. After ssh-keyscan github.com >> ~/.ssh/known_hosts: Permission denied (publickey) (no SSH private key configured)
3. Token-based HTTPS push with GH_ENTERPRISE_TOKEN: Invalid username or token. Password authentication is not supported for Git operations.
4. No git credential helper is configured.

Commands attempted

git push -u origin feature/15-echo-to-output-helpers
# Error: Host key verification failed.

ssh-keyscan github.com >> ~/.ssh/known_hosts
git push -u origin feature/15-echo-to-output-helpers
# Error: git@github.com: Permission denied (publickey).

GIT_CONFIG_NOSYSTEM=1 HOME=/tmp git push "https://x-access-token:${GH_ENTERPRISE_TOKEN}@github.com/credfeto/credfeto-ssh-key-mgr.git" HEAD:feature/15-echo-to-output-helpers
# Error: remote: Invalid username or token. Password authentication is not supported for Git operations.

Impact

Cannot push the feature branch for issue credfeto/credfeto-ssh-key-mgr#15. The environment needs either:

• An SSH private key for git@github.com available in the SSH agent, or
• A valid GitHub PAT that can be used for HTTPS git push (e.g. via git credential store or GIT_TOKEN env var)